As my time with linux, I created a lot of scripts. Some of them have input parameters and sometimes I just forget this parameters.

So I wonder if there is some way to create autocomplete parameters, like i autocomplete a path by pressing the tab key?

For example a script. ./test.sh can be completed with parameter-one, eg. ./test.sh parameter-one or ./test.sh parameter-two. If i type now ./test.sh followed by tab it should add parameter-one if i press tab again it should change to parameter-two.

How can I do that? I’m on bash…

  • unlawfulbooger@lemmy.blahaj.zone
    11·
    3 days ago

    Here’s an article that does this: https://iridakos.com/programming/2018/03/01/bash-programmable-completion-tutorial

    I have done this for one of my own tools ta, which is a function that switches to a tmux session, or creates it if it doesn’t exist:

    # switch to existing tmux session, or create it.
# overrides workdir if session name is "Work"
function ta() {
        case "$1" in
                Work) workdir="${HOME}/Work/" ;;
                *) workdir="${HOME}" ;;
        esac
        if tmux has-session -t "$@" &>/dev/null; then
                tmux switch-client -t "$@"
        else
                tmux new-session -A -D -d -c "${workdir}" -s "$@"
                tmux switch-client -t "$@"
        fi
}

# complete tmux sessions
# exclude current session from completion
function _ta_completion() {
        command="${1}"
        completing="${2}"
        previous="${3}"
        [[ "${command}" != 'ta' ]] && return
        current_session="$(tmux display-message -p '#S')"
        IFS=$'\a' COMPREPLY=( $(tmux list-sessions -F '#{session_name}' | grep -i "^${completing}" | grep -v "^${current_session}$"| tr '\n' '\a' ) )
}
# enable completion for ta function
complete -F _ta_completion ta

    Usage

    $ tmux (starts session "0" by default)
$ ta Personal # create session "Personal" because it doesn't exist
$ ta Work # create session "Work" because it doesn't exist
$ ta <tab> 
0 Personal
$ ta P<tab> -> $ta Personal
$ ta <tab>
0 Work
    • N0x0n@lemmy.ml
      1·
      3 days ago

      This really looks great, I got a question though. As I understand it, it works based on your bash_history which can be very small or autodeleted after each poweroff for privacy & security reasons.

      So it doesn’t work in that case. However, creating a file containing a list or array? Of commands could that be a possible way to implemented a similar behavior?

      I’m asking because I’m not very proficient in any programming language but have done some small bash scripts here and there and quite interested in this functionality !